NOAO >   Observing Info >   Approved Programs >   2014B-0247

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Proposal Information for 2014B-0247


PI: S. Mark Ammons, Lawrence Livermore National Laboratory, ammons1@llnl.gov
Address: Livermore, CA, 94551-9900, USA

CoI: Christian Marois, Herzberg Institute of Astrophysics
CoI: Bruce Macintosh, Lawrence Livermore National Laboratory
CoI: Quinn Konopacky, University of Toronto
CoI: Benoit Neichel, Gemini Telescope
CoI: Raphael Galicher, Observatoire de Paire
CoI: Eduardo Bendek, NASA Ames
CoI: Olivier Guyon, University of Arizona

Title: A Test of GEMS Astrometric Precision for Exoplanet Detection and Mass Measurement

Abstract: Precision astrometry is so far the only mainstream exoplanet detection technique that has yet to find a new planet. The unique capabilities of GeMS and GSAOI may finally be what we have been waiting for: the combination of a large aperture and wide-field AO correction for stable high-resolution wide-field diffraction-limited imaging. As part of this program, we have observed the astrometric calibrator star TYC 7122-00041-1 to demonstrate GeMS' long-term astrometric precision of < 0.4 mas in sparse fields (Ammons et al. 2013). Here, we propose two more epochs on the closest brown dwarf pair at 2 pc, WISE J1049-53 (Luhman 2013), newly discovered with Gemini in 2013 to be the third closest system known. GEMS will in one year obtain the best available projected relative orbits and a < 1% trigonometric distance, enabling precision masses and luminosity measurements for both L/T transition components of WISE 1049-53.


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